3-8
SWEEP FREQUENCY
OPERATION
The CW generator can generate broad (full range) and narrow band
sweeps across the frequency range of the instrument. The 680XXB has
two sweep frequency modes—step sweep and manual sweep. The fol-
lowing paragraphs describe how to select each sweep frequency mode,
a sweep range, an output power level, a sweep trigger, and frequency
markers. Use the Step Sweep and Manual Sweep Frequency Mode
menu maps (Chapter 4, Figures 4-3 and 4-4) to follow the menu se-
quences.
Selecting
Step Sweep
Mode
In step sweep frequency mode, the output frequency
changes in discrete, synthesized steps between se-
lected start and stop frequencies. Step sweeps can
be from a high frequency to a low frequency and
vice versa. The step size or number of steps between
the start and stop frequencies and the dwell time-
per-step are controllable from a step sweep menu.
To place the 680XXB in step sweep frequency mode,
press the main menu key
CW/SWEEP
SELECT
At the resulting menu display, press
Step
. The
Step Sweep Menu (below) is then displayed.
This menu lets you perform the following:
Select a sweep range (edit the sweep start and
stop frequency parameters).
Go to the sweep ramp menu (set the dwell
time-per-step, the step size or number of steps,
and select a sweep trigger).
Select an output power level for the sweep.
Go to the alternate sweep menu.
LOCAL (FRONT
SWEEP FREQUENCY
PANEL) OPERATION
OPERATION
680XXB OM
3-25
Summary of Contents for 680 B Series
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Page 11: ...Figure 1 1 Series 680XXB Synthesized CW Generator...
